铁合金文摘

ＴＨＪ1873　ＴＦ636　ＴＦ64232　ＴＦ64233ＡＯＤ转炉不锈钢中的锰合金〔ＭａｎｇａｎｅｓｅＡｌｌｏｙｉｎｇｏｆＳｔａｉｎｌｅｓｓＳｔｅｅｌｉｎＡＯＤＣｏｎｖｅｒｔｅｒ〕———(Ｐｅｒ.Ｍ.Ｍ.Ｎｏｒｂｅｒｇ,ＬｉｎｄａＴ.ＥｒｉＫｓｓｏｎ),《Ｅｌｅｃ.Ｆｕｒｎ...     

10Cr9Mo1VNB（T91）高压锅炉管用钢

１０Ｃｒ９Ｍｏ１ＶＮｂ（Ｔ９１）高压锅炉管用钢程世长，林肇杰，刘正东（冶金部钢铁研究总院６室）Ｔ９１Ｓｔｅｅｌ－１０Ｃｒ９Ｍｏ１ＶＮｂｆｏｒＨｉｇｈ－ＰｒｅｓｓｕｒｅＢｏｉｌｅｒＴｕｂｅｓ￥ＣｈｅｎｇＳｈｉｃｈａｎｇ；ＬｉｎＺｈａｏｊｉｅａｎｄＬｉｕ...     

The Fifth International Conference on the Beginnings of the Use of Metals and Alloys (BUMA)

ＴｈｉｓＢＵＭＡＣｏｎｆｅｒｅｎｃｅｉｓｏｒｇａｎｉｚｅｄｂｙａｎｄｆｏｒｔｈｅｒｅｓｅａｒｃｈｅｒｓｉｎｔｅｒｅｓｔｅｄｉｎｔｈｅｈｉｓｔｏｒｙｏｆｔｈｅｕｓｅｏｆｍｅｔａｌｓａｎｄａｌｌｏｙｓａｓａｒｅｓｅａｒｃｈｏｂｊｅｃｔｉｖｅｏｆｓｃｉｅｎｃｅａｎｄｔｅｃｈｎｏｌｏｇｙ.Ｔｈｅｃｏｎｆｅｒｅｎｃｅａｉｍｓｔｏｓｈａｒｅｉｔｓａｃｈｉｅｖｅｍｅｎｔｓｉｎｔｅｒｎａｔｉｏｎａｌｌｙ.ＴｈｉｓＢＵＭＡＣｏｎｆｅｒｅｎｃｅｈａｓｂｅｅｎｈｅｌｄｉｎＢｅｉｊｉｎｇ,Ｃｈｉｎａｔｈｒｅｅｔｉｍｅｓ.Ｔ…     

国际会议预报

１、第６届混凝土超塑性和其他化学混合物国际会议　将于２０００年１０月１０～１３日在法国尼斯ＰｌａｚａＣｏｎｃｏｒｄｅ酒店召开．会议由ＣａｎａｄａＣｏｎｔｒｅＭｉｎｅｒａｌａｎｄＥｎｅｒｇｙＴｅｈｎｏｌｏｇｙ（ＣＡＮＭＥＴ）；ＡｍＣｏｎｃｒｅｔｅＩｎｓｔ（ＡＣＩ）；ＮａｔｌＲｅｓｅａｒｃｈＣｏｕｎｅｉｌｏｆＣａｎａｄａ（ＮＲＣＣ）———ＩｎｓｔｆｏｒＲｅｓｅａｒｃｈｉｎＣｏｎｓｔｒａｃｔｉｏｎ主持，论文截稿日期：２０００年５月１５日，费用ＵＳ＄７２５．联系：ＭｏｈａｎＭａｌｈｏｔｒａ，４０５Ｒｏｃ…     

Bibliography of Science and Technology of Rare Earths Published in China（1994）

ＢｉｂｌｉｏｇｒａｐｈｙｏｆＳｃｉｅｎｃｅａｎｄＴｅｃｈｎｏｌｏｇｙｏｆＲａｒｅＥａｒｔｈｓＰｕｂｌｉｓｈｅｄｉｎＣｈｉｎａ（１９９４）￥ＳｏｌｉｄＳｔａｔｅＰｈｙｓｉｃｓ，ＳｏｌｉｄＳｔａｔｅＣｈｅｍｉｓｔｒｙａｎｄＮｅｗＭａｔｅｒｉａｌｓ１８６Ｔ...     

高速电子器件MOCVD材料的研究动态

阐述了ＭＥＳＦＥＴ、ＨＥＭＴ和ＨＢＴ等高速电子器件的ＭＯＣＶＤ材料的研制现状，对可能存在的问题进行了讨论。同时介绍了硅上异质外延ＧａＡｓ的新工艺及其在高速电子器件中的应用前景。     

高速电子器件MODVD8材料的研究动态

阐述了ＭＥＳＦＥＴ、ＨＥＭＴ和ＨＢＴ等高速电子器件的ＭＯＣＶＤ材料的研制现状，对可能存在的问题进行了讨论，同时介绍了硅上外延ＧａＡｓ的新工艺及其在高速电子器件中的应用前景。     

宝钢整体产销管理系统

该系统主机采用两台ＩＢＭ３９０系列９６７２大型机 ,构成双机Ｃｒｏｓｓ Ｄｏｍａｉｎ结构。处理器为ＣＭＯＳ ,处理能力３９ＭＩ／ｓ,内存５１２ＭＢ ,配有１２条光纤通道和３条并行通道 ,主要外存是１８０ＧＢ的磁盘子系统 ,两套磁带机和两台９１ＰＰＭ激光打印机。主机的操作系统为ＯＳ/３９０ ,开发工具采用ＩＢＭ /ＣＩＣＳ环境下的ＣＯＢＯＬ ,数据库采用ＩＢＭ /ＤＢ２ ,环境监控软件采用Ｃａｎｄｌｅ公司的ＯｍｅｇｍｏｎⅡ ,通信规约是ＴＣＰ/ＩＰ。通信环境由两个光纤主干网和大量局域网互联构成 ,二期主干网采用ＴＤＭ模式 ,通…     

MOCVD外延生长GaInAsSb合金半导体薄膜的模式识别和人工神经网…

用模式识别和人工神经网络法总结ＭＯＣＶＤ外延生长ＧａＩｎＡｓＳｂ薄膜的生长条件与外处层组成的关系。结果表明，气相中ＴＭＩｎ和ＴＭＳｂ的含量，Ⅴ／Ⅲ比和生长温度是影响外延层组成的主要因素。     

热锻过程中铸态M2高速钢显微组织变化

热锻过程中铸态Ｍ２高速钢显微组织变化ＣＨＡＮＧＥＯＦＭＩＣＲＯＯＲＧＡＮＩＳＭＯＦＣＡＳＴＩＮＧＳＴＡＴＥＭＺＨ．Ｓ．Ｓ．ＩＮＨＯＴ－ＦＯＲＧＩＮＧ￥Ｍ．Ｒ．ＧｈｏｍａｃｈｃｈｉＣ．Ｍ．Ｓｅｌｌａｒｓ￥／／１引言高速钢主要用于制做切削工具，它在铸态有...     

用于制备高性能钛基复合材料的碳包覆钛复合粉体研究进展

钛基复合材料中增强相的形貌和分布是决定材料性能的关键,常规粉体机械混合后烧结引入增强相的方式存在形貌难调控、分布单一且均匀性差等问题,导致其强化效果不佳。针对该问题,本团队开发了一系列碳包覆钛复合粉体,通过设计包覆碳源的结构与组成调控粉体烧结过程中增强相的形成路径,不仅实现了增强相形貌调控和不同形貌的组合搭配,而且得到了晶内和晶界双增强相组织,大幅提升了钛基复合材料的力学性能。在此基础上,将碳包覆钛复合粉体拓展应用至钛基复合材料的3D打印领域,解决了高品质复合粉体缺乏并制约其发展的瓶颈问题。总结并评述了碳包覆钛复合粉体在制备钛基复合材料中取得的研究结果与工作进展,为增强相设计与调控提供新的研究思路及技术路线。     

反应合成AgSnO2材料的显微组织和力学性能研究

采用一种新的工艺(反应合成法)制备了AgSnO2电接触材料，并对AgSnO2材料进行了显微组织和力学性能研究。结果表明：采用反应合成技术可以在Ag基体中合成尺寸细小、界面新鲜的SnO2颗粒，微米级的SnO2颗粒是由纳米级的SnO2颗粒聚集而成。由于SnO2颗粒在Ag基体内部通过反应原位获得，增强了sn02颗粒与Ag基体的界面结合能，改变了Ag和SnO2的结合状态，使AgSnO2材料的加工性能和力学性能得到改善和提高。     

自蔓延反应涂层法制备SiCp/Al复合材料及性能

对采用铝浴自蔓延反应涂层制备SiCp/Al复合材料的反应机理及与组织演变研究发现：在SiCp/Al表面形成TiC和Ti5Si3复合涂层，显著改善了SiCp与铝液的润湿性，凝固后的SiCp/Al复合材料经热挤压可进一步改善界面状态和界面结合。对它的力学性能和摩擦磨损性能研究表明：由于SiCp的加入对弹性模量的影响与其它方法制备的SiCp/Al复合材料相同，因此可通过降低反应程序，以便提高材料的力学性能。SiSp/Al复合材料摩擦性能主要取决于SiC颗粒的粒度及含量。     

Electron-beam melting with an intermediate container as an efficient way for the improvement of the mechanical properties of molybdenum

The ways of improving the mechanical properties of molybdenum at low temperatures are studied. Positive effects of electron-beam melting with an intermediate container (EBMIC) on the structure of molybdenum ingots, in particular, on refining from impurities and microstructure refinement are shown. The effect of EBMIC on the mechanical properties of molybdenum in the ductile-brittle transition temperature range is studied.     

碳纳米管增强Cu基和Al基复合材料界面改性

在碳纳米管(carbon nanotubes,CNTs)增强Cu基和Al基复合材料的制备中,界面改性是提高复合材料性能的重要方法。金属基体和碳纳米管间的有效界面结合直接影响了复合材料中界面的载荷传递、导电以及导热性能,从而影响复合材料性能。本文综述了近几年碳纳米管增强Cu基和Al基复合材料界面改性的工艺方法,讨论了界面改性工艺对碳纳米管增强Cu基和Al基复合材料界面结构和性能的影响。     

Performance of MWCNT-Reinforced SAC0307/Cu Solder Joint Under Multiple Reflow Cycles

The evolution of interfacial microstructure and its effect on shear strength under multiple reflow cycles for multi-walled carbon nanotubes (MWCNT)-reinforced Sn0.3Ag0.7Cu solder/copper joint was investigated. The melting characteristics, wettability and mechanical properties of the solder alloy were assessed. The addition of MWCNT in the range of 0.01–0.05 wt% improved the wettability, melting behaviour and mechanical strength of the SAC0307 solder alloy. The nanoparticles in small weight fraction (0.01–0.05 wt%) addition were more effective in retarding intermetallic compounds growth at the interface. Amongst all compositions studied, the SAC0307–0.05MWCNT nanocomposite showed significant improvement in the performance of SAC0307/Cu solder joint under multiple reflow condition. The nanoparticles’ reinforcement above 0.1 wt% of the solder alloy was ineffective in improving the solder performance due to increased clustering in the matrix.     

Effect of Carbon Nanotube Addition on Strength of Aluminum Welds Prepared by Ultrasound Welding

A multiwall carbon nanotube (MWCNT)-reinforced aluminum matrix composite was fabricated by ultrasonic metal welding. The composite microstructure was investigated using a scanning electron microscope, transmission electron microscopy, energy-dispersive X-ray spectrum, and X-ray diffraction. The mechanical properties and microhardness of the composite were measured. The nanotubes were confirmed to be embedded into the metal matrix while maintaining their multiwalled structure. Measurements revealed that the mechanical properties and microhardness were obviously enhanced, the welded interface remained smooth, and no reactant was produced.     

Effect of Melting Process on the Microstructure and Mechanical Properties of Fe–7 wt% Al Alloy

This article presents the effect of melting process on chemical composition, microstructure and mechanical properties of Fe–7 wt% Al alloy. The alloy ingot was prepared by air induction melting (AIM), air induction melting with flux cover (AIMFC) and vacuum induction melting (VIM) and cast into 50 mm diameter split cast iron mould. These cast ingots were hot-forged and hot-rolled at 1,373 K to 2 mm thick sheet. Hot-rolled alloys were characterized with respect to chemical composition, microstructure and mechanical properties. Ingots produced by AIM, AIMFC and VIM were free from gas porosity, however AIM ingots exhibited higher concentration of hydrogen as compared to AIMFC and VIM. The recovery of aluminium as well as reduction of oxygen during AIM is very poor as compared to AIMFC and VIM. AIMFC ingots exhibit low level of sulphur as compared to AIM and VIM ingots. The alloys produced by AIMFC and VIM exhibited superior tensile ductility compared to the alloys produced by AIM. The tensile properties of alloys produced by AIMFC are comparable to the alloys produced by VIM.     

Effect of current pulses on the temperature distribution and microstructure in TIG tantalum welds

The welding process employed for bonding metals by melting and solidification produces a joint which is generally inhomogeneous. The micro structure of the fused zone and its adjacent heat affected zone, HAZ, is usually different from the microstructure of the parent metal, obtained by mechanical working or heat treatment. The fused zone is usually composed of coarse columnar grains characteristic of as-cast structures. If the parent metal was originally cold-worked, recrystallization will occur in the HAZ, producing a coarse grained structure. As a result of the effect of the microstructure on the mechanical properties of the weld, the obtained joint may be weaker than the rest of the structure which was not affected by the heat of the welding. Although in some cases it is possible to improve the properties of the weld by post-welding heat treatment, different methods are tried in order to improve the microstructure directly during the welding process.     

含Cu高熵合金的组织结构和力学性能分析

高熵合金（HEAs）是一种由5种或5种以上元素以接近等原子比的方式混合而成的一种新型合金。HEAs的概念为开发具有独特性能的先进材料提供了新的途径，这是传统的基于单一主导元素的微合金化方法无法实现的。由于Cu元素与HEAs中其他元素的混合焓均为正值，因而更容易偏聚形成富Cu的面心立方（fcc）结构。本文主要总结了合金成分、制备方法对含Cu HEAs组织结构的影响规律以及含Cu HEAs的热稳定性。例如Al的添加会使CoCrCuFeNi合金从fcc单相转变为fcc+bcc的双相结构，而Ni含量的增加则会将AlCoCrCuNi的多相组织转变为单相fcc结构。与传统铸造工艺相比，选区激光熔化和喷溅急冷等具有极高的冷却速度，限制了元素的扩散，因而制备而成的AlCoCuFeNi和AlCoCrCuFeNi合金均是bcc结构。组织结构的改变会进一步影响含Cu HEAs力学性能，因而本文也探讨了合金成分、制备工艺和服役温度与力学性能的关系。例如，V的添加可以提高合金的强度，以先进制备方法如选区激光熔化或激光粉末熔融得到的合金具有优于铸造合金的力学性能。